Postgenomic understandings of fatness and metabolism

'Obesity' has, for decades, been a subject of intense scientific and public interest, and remains a key target for postgenomic science. I examine the emergence of determinism in research into 'obesity' in the postgenomic field of metabolomics. I argue that determinism appears in metabolomics research in two ways: firstly, fragmentation and narrow construal of the environment is evident in metabolomics studies on weight loss interventions, resulting in particular features of the environment (notably, dietary intake) having outsized influence while the wider social environment is neglected. Secondly, studies aiming to characterize the metabolic signature of 'obesity' are guided by a commitment to a deterministic connection between 'obesity' and dysfunction, leading to a neglect or distortion of metabolic heterogeneity across individuals regardless of body size.

The Temporal Politics of Placenta Epigenetics: Bodies, Environments and Time

This article builds on feminist scholarship on new biologies and the body to describe the temporal politics of epigenetic research related to the human placenta. Drawing on interviews with scientists and observations at conferences and in laboratories, we argue that epigenetic research simultaneously positions placenta tissue as a way back into maternal and fetal bodies following birth, as a lens onto children's future well-being, and as a bankable resource for ongoing research. Our findings reflect how developmental models of health have helped recast the placenta as an agential organ that is uniquely responsive to environments during pregnancy and capable of embodying biological evidence about the effects of in utero experiences after birth. We develop the concept of 'recursive embodiment' to describe how placenta epigenetics is reimagining relationships between bodies and environments across developmental, epigenetic, and generational time, and the impacts this has for experiences of pregnancy and responsibilities related to children's health.

Epigenetic citizenship and political claims-making: the ethics of molecularizing structural racism

Epigenetics has generated excitement over its potential to inform health disparities research by capturing the molecular signatures of social experiences. This paper highlights the concerns implied by these expectations of epigenetics research and discusses the possible ramifications of 'molecularizing' the forms of social suffering currently examined in epigenetics studies. Researchers working with oppressed populations-particularly racially marginalized groups-should further anticipate how their results might be interpreted to avoid fueling prejudiced claims of biological essentialism. Introducing the concept of 'epigenetic citizenship,' this paper considers the ways environmentally responsive methylation cues may be used in direct-to-consumer testing, healthcare, and biopolitical interactions. The conclusion addresses the future of social epigenetics research and the utility of an epigenetic citizenship framework.

Maternal epigenetic responsibility: what can we learn from the pandemic?

This paper examines the construction of maternal responsibility in transgenerational epigenetics and its implications for pregnant women. Transgenerational epigenetics is suggesting a link between maternal behaviour and lifestyle during pregnancy and the subsequent well-being of their children. For example, poor prenatal diet and exposure to maternal distress during pregnancy are linked to epigenetic changes, which may cause health problems in the offspring. In this field, the uterus is seen as a micro-environment in which new generations can take shape. Because epigenetics concerns how gene expression is influenced by the social realm, including a range of environmental conditions such as stress, diet, smoking, exercise, exposure to chemicals, pollution, and environmental hazards, the research findings in this area have direct policy relevance. For policy makers, rather than controlling this complex range of determinants of health, isolating and targeting maternal body and responsibilising mothers for the control of this micro-environment might seem feasible. Yet, examining the maternal body in isolation as a powerful environment to shape the health of next generations not only responsibilises women for the environment that they cannot control but also makes them a target for intrusive and potentially exploitative biomedical interventions. Even though 'social factors' are increasingly considered in epigenetics writing, the phrase is usually taken as self-explanatory without much elaboration. Drawing on the Covid-19 pandemic, this paper moves the current debate forward by providing consolidated examples of how individuals, including pregnant women, have little control over their environment and lifestyle. As evidenced by the pandemic's disproportionate effects on people with low socioeconomic or poor health status, some pregnant women bore considerable physical and psychological stress which combined with other stress factors such as domestic violence.

Gender Beneath the Skull: Agency, Trauma and Persisting Stereotypes in Neuroepigenetics

Epigenetics stands in a complex relationship to issues of sex and gender. As a scientific field, it has been heavily criticized for disproportionately targeting the maternal body and reproducing deterministic views of biological sex (Kenney and Müller, 2017; Lappé, 2018; Richardson et al., 2014). And yet, it also represents the culmination of a long tradition of engaging with developmental biology as a feminist cause, because of the dispersal of the supposed 'master code' of DNA among wider cellular, organismic and ecological contexts (Keller, 1988). In this paper, we explore a number of tensions at the intersection of sex, gender and trauma that are playing out in the emerging area of neuroepigenetics - a relatively new subfield of epigenetics specifically interested in environment-brain relations through epigenetic modifications in neurons. Using qualitative interviews with leading scientists, we explore how trauma is conceptualized in neuroepigenetics, paying attention to its gendered dimensions. We address a number of concerns raised by feminist STS researchers in regard to epigenetics, and illustrate why we believe close engagement with neuroepigenetic claims, and neuroepigenetic researchers themselves, is a crucial step for social scientists interested in questions of embodiment and trauma. We argue this for three reasons: (1) Neuroepigenetic studies are recognizing the agential capacities of biological materials such as genes, neurotransmitters and methyl groups, and how they influence memory formation; (2) Neuroepigenetic conceptions of trauma are yet to be robustly coupled with social and anthropological theories of violence (Eliot, 2021; Nelson, 2021; Walby, 2013); (3) In spite of the gendered assumptions we find in neuroepigenetics, there are fruitful spaces - through collaboration - to be conceptualizing gender beyond culture-biology and nature-nurture binaries (Lock and Nguyen, 2010). To borrow Gravlee's (2009: 51) phrase, we find reason for social scientists to consider how gender is not only constructed, but how it may "become biology" via epigenetic and other biological pathways. Ultimately, we argue that a robust epigenetic methodology is one which values the integrity of expertise outside its own field, and can have an open, not empty mind to cross-disciplinary dialogue.

Who's afraid of epigenetics? Habits, instincts, and Charles Darwin's evolutionary theory

Our paper aims at bringing to the fore the crucial role that habits play in Charles Darwin's theory of evolution by means of natural selection. We have organized the paper in two steps: first, we analyse value and functions of the concept of habit in Darwin's early works, notably in his Notebooks, and compare these views to his mature understanding of the concept in the Origin of Species and later works; second, we discuss Darwin's ideas on habits in the light of today's theories of epigenetic inheritance, which describe the way in which the functioning and expression of genes is modified by the environment, and how these modifications are transmitted over generations. We argue that Darwin's lasting and multifaceted interest in the notion of habit, throughout his intellectual life, is both conceptually and methodologically relevant. From a conceptual point of view, intriguing similarities can be found between Darwin's (early) conception of habit and contemporary views on epigenetic inheritance. From a methodological point of view, we suggest that Darwin's plastic approach to habits, from his early writings up to the mature works, can provide today's evolutionary scientists with a viable methodological model to address the challenging task of extending and expanding evolutionary theory, with particular reference to the integration of epigenetic mechanisms into existing models of evolutionary change. Over his entire life Darwin has modified and reassessed his views on habits as many times as required by evidence: his work on this notion may represent the paradigm of a habit of good scientific research methodology.

Using Vector Autoregression Modeling to Reveal Bidirectional Relationships in Gender/Sex-Related Interactions in Mother-Infant Dyads

Vector autoregression (VAR) modeling allows probing bidirectional relationships in gender/sex development and may support hypothesis testing following multi-modal data collection. We show VAR in three lights: supporting a hypothesis, rejecting a hypothesis, and opening up new questions. To illustrate these capacities of VAR, we reanalyzed longitudinal data that recorded dyadic mother-infant interactions for 15 boys and 15 girls aged 3 to 11 months of age. We examined monthly counts of 15 infant behaviors and 13 maternal behaviors (Seifer et al., 1994). VAR models demonstrated that infant crawling predicted a subsequently close feedback loop from mothers of boys but a subsequently open-ended, branched response from mothers of girls. A different finding showed that boys' standing independently predicted significant later increases of four maternal behaviors: rocking/jiggling, lifting, affectionate touching, and stimulation of infant gross-motor activity. In contrast, crawling by girls led mothers to later decrease the same maternal behaviors. Thus, VAR might allow us to identify how mothers respond differently during daily interactions depending on infant gender/sex. The present work intends to mainly showcase the VAR method in the specific context of the empirical study of gender/sex development.

A task that remains before us: Reconsidering inheritance as a biosocial phenomenon

What doesit mean to inherit? Debates about the meaning of inheritance are numerous in the history and the present of the biological and the social sciences. While the majority of contributions in this special issue discuss hitherto unthought of molecular mechanisms of biological inheritance, this review explores the contested territory of inheritance from a social science perspective. Specifically, it examines contemporary biological research on epigenetic forms of inheritance in its historical and social contexts. To that end, the review explores what biology itself has been inheriting when it comes to how it considers inheritance conceptually and experimentally. I delineate three particularly important strands of inheritance: inheriting a history of eugenics; inheriting determinist reasoning; and inheriting experimental reductionism. I approach the social and scientific meaning of these inheritances by following scholars such as Donna Haraway and Jacques Derrida, who frame inheritance not as a passive occurrence but as an active process, as a task that must be undertaken by those who inherit. Such a framing raises the question of what it might mean to inherit something responsibly - particularly when what needs to be inherited is not an object but a difficult history. I argue that in order to become 'response-able' to this question, researchers who investigate biological inheritance today must engage these histories critically and review their legacies in present-day research. This is a task biologists might not want to undertake alone, but in interdisciplinary collaboration with social scientists and humanities scholars, in order to mobilize multiple forms of expertise for understanding the complex biosocial processes of human inheritance.